Valve grinder



` 1,5621098 J. KLElNscl-IMIDT VALVE GRINDER Nov. 17, 1925- Fled Aug. 1l. 1924 2 Sheets-Sheet 1 akamu-q Nov. 17, 1925. y 1,562,098A

J. KLElNSCHMlD-f VALVE GRINDER l Filed Aug. 11, 1924 2 Sheets-sheet. 2

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Patented Nov.. 1?', i925.

vS'TES i 1,562,098 PATENT OFFICE.l

JACOB KLEENSCHMIDT, OF KIIfIMSWICK, MISSOURI.

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Application filed. August 11, 1924. Serial No. 731,378.

grinders, but more particularly to the multiple stem valve grinders adaptable to the grinding of valves in removable cylinder heads and valve cages g. and its object is to provide al valve grinding mechanism which will automatically oscillate, lift, reseat, and' again oscillate theV valves in' their seats, until the said valves have been moved around their entire circumference and are aroperly ground tight. Y

Another object is to provide a simple practical and efficient device that can be operated either by hand or by power.

lV ith these and other objects in mind the invention resides in its specific aspect in the construction, arrangement and operation of the several parts to be described in the accompanying drawings and specification.

In the drawings v Figure 1 is a side elevation of a valve grinding mechanism as mounted foruse.

Figure2 is a longitudinal vertical section.

Figure 3 is a transverse vertical section thru one of the valve grinding shafts. y

`Figure l is a transverse vertical sectionv thru the gear housing and gears.

Figurel :Sis a top plan vieW.`

Figure 6 is a detail4 of one of the legs.

Figure 7 is a detail of an extension socket.

Figure 8 is a detail of the refacer.

In carrying out this invention, I provide a base 1 having base supporting legs 2 secured thereto. Tracks 3 are rigidly secured to the base 1 and are adapted to b e releasably secured to the cylinder block by means of legs -f A primary rack bar having a shaft aperture 6 cut therein is slidingly mounted upon the base 1. The said rack ba 5 has gear teeth 7 cut therein. A drive shaft 8, is vertically `iournaled in the base 1 and the gear housing 9 which is secured to the said base 1. A half gear 10 is mounted upon the vert-ical drive shaft 8 above the primary rack bar 5. Spur gears 11 are rotatively mounted upon shafts 12 journaled in the base 1 on both sides of the primary rack bar 5, and engage the gear teeth 7 ofv horizontally the rack bars 5 and the half gear lO. A Worin gear 12a is rigidly secured upon the vertical drive shaft 8 and .is adapted to enmesh a Worm 13 mounted upon a shaft 14- end squared'as shown at 15 to permit operating the grindingy mechanism either with a crank or With a motor. In the event amotor is used for operating the grinding mechanisin, the base 1 is extended as shown in Big. lto permit mounting the motor thereon. Shaft brackets 16 are releasably secured to the tracks 8. The said shaft brack ets 16 have cam shaft apertures 17, cam a1- ertures 18, grinding shaft apertures 19, pinion apertures 20, and rack bar aperturesp21 provided therein. A beveled gearr 22 is mounted upon the vertical drive shaft 8 above the half gear 10 and the vvornigear journaled Within the gear' vhousingt 9. The said shaft 14; has its one 12a. A beveled gear 23 Which meshes With thev beveled gear 2 2is mounted upon a cam shaft 211 journaled in the gear housingf9 and 'l 18 upon the cam shaft 24 by means of keys 28. The said cams 26 have concavo-convex` peripheries asshovv-n at k29. v The kkeyi'vays 27 of .the cams 26 are'cut atdifferent angles for a purpose to be later explained.

Grinding shafts SOhaving keyvvays 31 vout therein and spring caps 82 carrying coil springs 38 slidingly` secured :thereto by means of set screws 8d which engage the said keyways 81, slidingly engage the grinding shaft apertures 19. The said grinding shafts 30 have sockets 35 cut therein. Pinions 36 are slidingly secured upon the grinding shafts 8O by means of keys 87 engaging the keyvvays 31. Coil springs 38 are mounted upon the grinding shafts 8O and engage the pinions 36 and the spring caps 82. A secondary rock bar 39 having gear teeth 40 cut therein is rigidly secured to the primary rack bar 5 and engages the rack bar apertures 21 and the pinions v86. Plates 41 having apertures ft2' i provided therein, are mounted over the grinding `shafts 30 and secured to the shaft brackets 16. Valve engaging stems 43 are releasably secured in the sockets '85 of the grinding shafts 30 by means of thumb screws t. tering cups 45 and coil springs 4:6 are Cenmounted upon the valve engaging stems 43; the said coil springs '4G being adapted lto engage the grinding shafts 30 and the centering cups 45. `Extension sockets i7 are provided, and adapted to engage the sockets 35 of the grinding shafts 30. One of the legs t is hinged as shown by the dotted lines in Fig. 6. Legs of various-design .may be employed to suit thedesignof the va 1ious 'cylinder blocks. Refacing knives i8 are provided and when in use they are located between the valve seats andk the valves. ln: operation' the refacing knives 4:8 face off the valve seats when rotating in one direction and the valves when rotatingin the opposite direction.

ln operation the tracks 3 are rsecured to the cylinder block by means of the legs et so that the centering cups set over the valves; the shaft'brackets 1G and cams 2G' being slidinglyfsecured. The said centering Y cups may i'eadily be aligned with the valves Without difficulty. t6 which engage the grinding shafts 30 land the centeringvcups 45, are adapted to keep` the said centering'cups 45 in constant engagement with the cylinder block. -Vvhen the `vertical drive shaft 8 is rotated, the beveled gear 22, Which is mounted upon the said vertical drive shaft 8, rotates the cam shaft 2% thru the medium of the beveled Y* the pinions G lvvhichare mounted upon the said .grinding Vshafts 30 and mesh with the secondary rack bar 39. TheA cams26 are adapted to keep the valves firmly seated in the valve seats when grinding, While the concaved portions `of they said cams 36 are provided to permit' the coil springsBS to raise The coil springs the said grinding shafts 30 for reseat-ing the valves. If it is desired to look at the valves during the grinding operation, the end legs t are released and theY device laid over on its side, Where it is held in that position by the hinged leg 1l.

While I have herein described a certain speeiiic Amanner and method of constructing and assembling the elements of my invention, it is understood that l may vary from the same in minor details, not departing from.y the spirit of my invention, so asbest to construct a practical device for the purpose intended, :1s/defined in. the appended i teeth and a shaft apertureprovided'therein slidingly mountedupon the base; a gear housing secured to the base; a. drive shaft vertically Journaled in the gear housing and linthe base, engaging the shaft aperture provided in the primary rack bar; a half gear mounted upon the vertical drive shaft; spur gears rotatively secured Ato the base engaging the half gear and the primary rack bar;

means for dri fing the vertical drive shaft, shaft brackets, releasably secured to the I tracks; grinding shafts mounted in theshaft brackets; pinions slidingly secured -to the grinding shafts; a secondary raokbarlhaving'gear teeth out therein, mounted in the shaft brackets, engaging the pinions secured Vto the primary rack bar; valve engaging L 'JACOB KLEINSCHMIDT. 

